EP 0913424 A3 20000223 - Coated expansible styrene particles
Title (en)
Coated expansible styrene particles
Title (de)
Beschichtete expandierbare Polystyrolpartikel
Title (fr)
Perles styréniques expansibles recouvertes
Publication
Application
Priority
DE 19747539 A 19971028
Abstract (en)
[origin: EP0913424A2] Expandable polystyrene particles (I) containing a blowing agent have a diameter of 0.35-3 mm and are coated with 0.005 to less than 0.5 wt.% of a hydrophobic agent (II) that melts above 10 degrees C. (II) is a carboxylate of aluminum, zirconium or hafnium. Independent claims are included for (i) the production of (I) by treatment of expandable polystyrene particles with an aqueous solution containing 5-50 wt.% (II) or by coating the expandable polystyrene particles with solid (II) that has been adsorbed onto fine particulate silicic acid; (ii) the production of expanded polystyrene particles by foaming (I) or by coating expanded polystyrene particles with 0.005 to less than 5 wt.% (II); and (iii) expanded polystyrene particles prepared from (I).
IPC 1-7
IPC 8 full level
C08J 9/224 (2006.01); C08J 9/228 (2006.01); C08K 5/098 (2006.01)
CPC (source: EP)
C08J 9/224 (2013.01); C08K 5/098 (2013.01); C08J 2325/06 (2013.01)
Citation (search report)
- [AD] EP 0449065 A2 19911002 - BASF AG [DE]
- [A] PATENT ABSTRACTS OF JAPAN vol. 018, no. 166 (P - 1713) 18 March 1994 (1994-03-18)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
DE 19747539 A1 19990429; DE 59812324 D1 20050105; EP 0913424 A2 19990506; EP 0913424 A3 20000223; EP 0913424 B1 20041201; ES 2231935 T3 20050516
DOCDB simple family (application)
DE 19747539 A 19971028; DE 59812324 T 19981007; EP 98118982 A 19981007; ES 98118982 T 19981007